Kaiyan Electronic has strict quality control policy and got ISO9000:2000 Certificate in August, 2001. Adhering to our policy, that is “quality first, elaborate operation, sincere service, consistent improvement customer satisfaction”, people will ...

GemVale is located in the capital of Chinese jewellery-- Shenzhen. We specialized R&D, manufacture, marketing gem&jewellery test instruments, we aim to supply professional instruments with superior quality and cost performance. Our products are widely ...